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AFE 49-04043 ATLAS 4" Dual DPF-Back Exhaust System

2011-2016 GM 6.6L Duramax LML* (All Cabs & Beds)
Part #:
FROM 574.75
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The AFE 49-04043 ATLAS 4" Dual Exhaust System is a sure way to increase flow and add some styling to your 2011-2016 Duramax LML. This system is built from 4" Aluminized steel tube and installs using the same factory locations as your stock exhaust. Designed as a bolt-on kit, this system also includes all hardware needed for installation of the second tailpipe as well as high quality band clamps and OE-style bayonet hangers. The final touch is your choice of 2 polished or black powdercoated 6" exhaust tips.

Single To Dual Exhaust Conversion:
This exhaust is designed to convert the standard single exhaust into an aggressive dual exhaust.

Fits With Spare Tire:
This exhaust system fits perfectly without relocating the spare tire.

OE Fit:
OE-style bayonet hangers are used to maintain a stable pipe location during high vibration and high heat conditions. The bayonet tip holds the hanger bushing in place for an OE-style fit that does not change with time. 

Flow and Performance:
This ATLAS exhaust system is constructed of 4" mandrel-bent stainless steel tubing for maximum flow. Smooth transition bends allow for low turbulence, increasing horsepower, torque and lowering EGTs.


  • 4" Aluminized Steel 
  • Fits With Spare Tire 
  • OE Style Bayonet Hangers
Exhaust Tip Finish
Polished 49-04043-P
Black 49-04043-B

Note: This exhaust system only fits 2016 2500HD models without the NOX Sensor.


  • Manufacturer Name AFE
  • Shipping Weight 50.00 lb.
  • Warranty Yes
  • Warranty Info 2 Year
  • Prop 65 WARNING: Cancer & Reproductive Harm -


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Most Popular Questions

Will this fit my 2016 GMC 3500 Dually?
View Staff Answer 

The AFE 49-04043 ATLAS 4" DUAL DPF-BACK EXHAUST SYSTEM will fit the following applications:
2011-2016 GM 6.6L Duramax LML*

* Does not fit 2016 3500HD w/ NOX Sensor.